| Parameter |
Value |
| Designation |
P/2015 K5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-06T08:58:18.402240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:11Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-06-12.0000000 |
| e |
0.55395709 |
| q (au) |
2.986133 |
| a (au) |
6.694721 |
| i (deg) |
39.987279 |
| Ω (om, deg) |
134.269042 |
| ω (w, deg) |
105.994786 |
| M (ma, deg) |
0.320124 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.097 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.097 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.936 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
05:14:20.26 |
-09:23:36.7 |
HIP 24277 |
26.59 |
| 2026-03-26 12:00 |
05:14:25.47 |
-09:21:47.2 |
HIP 24277 |
27.44 |
| 2026-03-27 00:00 |
05:14:30.76 |
-09:19:57.8 |
HIP 24277 |
28.46 |
| 2026-03-27 12:00 |
05:14:36.15 |
-09:18:08.8 |
HIP 24277 |
29.64 |
| 2026-03-28 00:00 |
05:14:41.62 |
-09:16:20.0 |
HIP 24277 |
30.96 |
| 2026-03-28 12:00 |
05:14:47.18 |
-09:14:31.5 |
HIP 24277 |
32.40 |
| 2026-03-29 00:00 |
05:14:52.83 |
-09:12:43.2 |
HIP 24277 |
33.96 |
| 2026-03-29 12:00 |
05:14:58.56 |
-09:10:55.3 |
HIP 24277 |
35.61 |
| 2026-03-30 00:00 |
05:15:04.39 |
-09:09:07.6 |
HIP 24277 |
37.36 |
| 2026-03-30 12:00 |
05:15:10.30 |
-09:07:20.3 |
HIP 24277 |
39.18 |
| 2026-03-31 00:00 |
05:15:16.29 |
-09:05:33.2 |
HIP 24277 |
41.06 |
| 2026-03-31 12:00 |
05:15:22.37 |
-09:03:46.4 |
HIP 24277 |
43.01 |
| 2026-04-01 00:00 |
05:15:28.53 |
-09:02:00.0 |
HIP 24692 |
40.77 |
| 2026-04-01 12:00 |
05:15:34.78 |
-09:00:13.8 |
HIP 24692 |
38.51 |
| 2026-04-02 00:00 |
05:15:41.12 |
-08:58:28.0 |
HIP 24692 |
36.24 |
| 2026-04-02 12:00 |
05:15:47.53 |
-08:56:42.4 |
HIP 24692 |
33.97 |
| 2026-04-03 00:00 |
05:15:54.04 |
-08:54:57.2 |
HIP 24692 |
31.69 |
| 2026-04-03 12:00 |
05:16:00.62 |
-08:53:12.4 |
HIP 24692 |
29.42 |
| 2026-04-04 00:00 |
05:16:07.28 |
-08:51:27.9 |
HIP 24692 |
27.15 |
| 2026-04-04 12:00 |
05:16:14.03 |
-08:49:43.7 |
HIP 24692 |
24.89 |
| 2026-04-05 00:00 |
05:16:20.86 |
-08:47:59.8 |
HIP 24692 |
22.64 |
| 2026-04-05 12:00 |
05:16:27.77 |
-08:46:16.3 |
HIP 24692 |
20.41 |
| 2026-04-06 00:00 |
05:16:34.76 |
-08:44:33.2 |
HIP 24692 |
18.22 |
| 2026-04-06 12:00 |
05:16:41.83 |
-08:42:50.4 |
HIP 24692 |
16.08 |
| 2026-04-07 00:00 |
05:16:48.98 |
-08:41:07.9 |
HIP 24692 |
14.02 |
| 2026-04-07 12:00 |
05:16:56.21 |
-08:39:25.9 |
HIP 24692 |
12.09 |
| 2026-04-08 00:00 |
05:17:03.52 |
-08:37:44.2 |
HIP 24692 |
10.37 |
| 2026-04-08 12:00 |
05:17:10.90 |
-08:36:02.9 |
HIP 24692 |
8.99 |
| 2026-04-09 00:00 |
05:17:18.37 |
-08:34:21.9 |
HIP 24692 |
8.13 |
| 2026-04-09 12:00 |
05:17:25.91 |
-08:32:41.3 |
HIP 24692 |
7.97 |
| 2026-04-10 00:00 |
05:17:33.53 |
-08:31:01.2 |
HIP 24692 |
8.57 |
| 2026-04-10 12:00 |
05:17:41.23 |
-08:29:21.4 |
HIP 24692 |
9.79 |
| 2026-04-11 00:00 |
05:17:49.00 |
-08:27:42.0 |
HIP 24692 |
11.44 |
| 2026-04-11 12:00 |
05:17:56.84 |
-08:26:03.0 |
HIP 24708 |
12.40 |
| 2026-04-12 00:00 |
05:18:04.77 |
-08:24:24.4 |
HIP 24708 |
10.76 |
| 2026-04-12 12:00 |
05:18:12.76 |
-08:22:46.3 |
HIP 24708 |
9.54 |
| 2026-04-13 00:00 |
05:18:20.84 |
-08:21:08.5 |
HIP 24708 |
8.93 |
| 2026-04-13 12:00 |
05:18:28.98 |
-08:19:31.2 |
HIP 24708 |
9.06 |
| 2026-04-14 00:00 |
05:18:37.20 |
-08:17:54.2 |
HIP 24708 |
9.91 |
| 2026-04-14 12:00 |
05:18:45.49 |
-08:16:17.7 |
HIP 24708 |
11.32 |
| 2026-04-15 00:00 |
05:18:53.85 |
-08:14:41.7 |
HIP 24708 |
13.13 |
| 2026-04-15 12:00 |
05:19:02.29 |
-08:13:06.1 |
HIP 24708 |
15.19 |
| 2026-04-16 00:00 |
05:19:10.80 |
-08:11:30.9 |
HIP 24708 |
17.42 |